EP0595786B1 - Colocated cellular radiotelephone systems - Google Patents
Colocated cellular radiotelephone systems Download PDFInfo
- Publication number
- EP0595786B1 EP0595786B1 EP94100417A EP94100417A EP0595786B1 EP 0595786 B1 EP0595786 B1 EP 0595786B1 EP 94100417 A EP94100417 A EP 94100417A EP 94100417 A EP94100417 A EP 94100417A EP 0595786 B1 EP0595786 B1 EP 0595786B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiotelephone
- trunks
- mobile
- block
- cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
Definitions
- Modern cellular radiotelephone systems have a comparatively large number of radio channels available which, further, can be effectively multiplied by reuse of the radio channels in a geographical area, such as the metropolitan area of a large city like Chicago or New York, by dividing the radio coverage area into smaller coverage areas called "cells" using low power transmitters and coverage restricted receivers.
- a geographical area such as the metropolitan area of a large city like Chicago or New York
- the limited coverage area enables the radio channels used in one cell to be reused in another cell geographically separated according to a predetermined plan, such as a four cell pattern shown and described in U.S. patent no. 4,128,740. In this four cell pattern, each cell is assigned a subset of the available radio channels and reuse of the radio channels is accomplished by repeating the pattern throughout a geographical area.
- the novel method comprises the steps of: coupling in trunks and out trunks of said second radiotelephone system to the central office; coupling the said first radiotelephone system to the said second radiotelephone system by means of inter-office trunks using standard channel-associated supervisory signalling and standard multi-frequency address signalling or other equivalent signalling methods accommodated by both said radiotelephone systems; locating fixed site radio apparatus of said second radiotelephone system with fixed site radio apparatus of said first radiotelephone system in each cell; assigning the access-only radio channels and at least two of the plurality of the voice radio channels to the fixed site radio apparatus of said first radiotelephone system located therein, and the paging/access radio channels and at least two of the plurality of the voice radio channels to the fixed site radio apparatus of said second radiotelephone system located therein to each cell; arranging the information contained in the data messages transmitted by the fixed site radio apparatus of the said first and second radiotelephone systems on the access-only and the paging/access radio channels, respectively, so that mobile stations in the idle state always monitor the paging/
- the percentage of calls transferred by M-system 101 to X-system 102 can be preselected to provide X-system 102 with a desired traffic load or may be dynamically varied depending on parameters selected by the system operator and the actual traffic load of both systems 101 and 102.
- the originating mobile Upon receipt of the directed retry message, the originating mobile scans and selects one of the nine access-only channels of base sites 121-124. As a result of this unique operating mode of systems 101 and 102, all incoming traffic from central office 110 is processed by M-system 101 and the outgoing traffic from mobiles is split between them M-system 101 and X-system 102.
- a check is made to determine if a handoff message has been received.
- a handoff message is sent to a mobile when it passes from one cell into another. If a handoff message has been received, YES branch is taken to block 250 where the audio path is opened. Next, at block 246, the mobile tunes to the new voice channel received in the handoff message and reconnects the audio path. If a handoff message is not received, NO branch is taken from decision block 251 to decision block 252, where a check is made to determine if the call has been completed. If not, NO branch is taken back to decision block 251. If the call has been completed, YES branch is taken from decision block 252 to block 253 where the audio is opened and a call complete message is sent by the mobile. Thereafter, the mobile returns to block 202 in Figure 5 to repeat the scanning process.
- a check is made to determine if a land disconnect message has been received. If so, YES branch is taken to block 315, where a release message is sent to the mobile identified in the land disconnect message. If a land disconnect message has not been received, NO branch is taken from decision block 314 to decision block 316, where a check is made to determine if a mobile origination message has been received. If not, NO branch is taken to return to block 303. If a mobile origination message has been received, YES branch is taken to decision block 317, where a check is made to determine if the originating mobile has feature control. If so, YES branch is taken to block 321 to assign an available voice channel to the originating mobile and send a mobile origination message to M-system control terminal 420.
Abstract
Description
locating fixed site radio apparatus of said second radiotelephone system with fixed site radio apparatus of said first radiotelephone system in each cell; assigning the access-only radio channels and at least two of the plurality of the voice radio channels to the fixed site radio apparatus of said first radiotelephone system located therein, and the paging/access radio channels and at least two of the plurality of the voice radio channels to the fixed site radio apparatus of said second radiotelephone system located therein to each cell; arranging the information contained in the data messages transmitted by the fixed site radio apparatus of the said first and second radiotelephone systems on the access-only and the paging/access radio channels, respectively, so that mobile stations in the idle state always monitor the paging/access radio channels controlled by the said second radiotelephone systems; processing all land-originated calls to mobile stations through said second radiotelephone system, transmitting all pages on the paging/access radio channels controlled by said second radiotelephone system; receiving all page responses from mobile stations via the paging/access radio channels and processing those responses in said second radiotelephone system; receiving all mobile-originated calls via the paging/access channels controlled by the said second radiotelephone system; and redirecting a dynamically selectable percentage of telephone calls originated by radiotelephones from said second radiotelephone system to said first radiotelephone system by way of the access-only radio channels.
Claims (7)
- A method of processing radiotelephone calls in at least first and second radiotelephone systems (102, 101) and a central office (110) for providing telephone service to radiotelephones located in a geographical area, said geographical area divided into a plurality of cells (401-403), each cell (401-403) assigned a plurality of voice channels, a paging channel and/or at least an access channel utilizing radio channels which differ from those radio channels assigned to adjoining cells, said first radiotelephone system (102) including a plurality of out trunks (159), a plurality of inter-office trunks (150) and a plurality of fixed site radio apparatus (121-124) each located in a different cell (401-404) for communicating with said radiotelephones, and said second radiotelephone system (101) including a plurality of in trunks (157), a plurality of out trunks (155), a plurality of inter-office trunks (150) and a plurality of fixed site radio apparatus (411-414) each located in a different cell (401-404) for communicating with said radiotelephones, said method characterized by the steps of:coupling out trunks (159) of said first radiotelephone system (102) to the central office (110);coupling in trunks (157) and out trunks (155) of said second radiotelephone system (101) to the central office (110);coupling inter-office trunks (150) of said first radiotelephone system (102) to inter-office trunks (150) of said second radiotelephone system (101);locating each fixed site radio apparatus (411-414) of said second radiotelephone system (101) with the fixed site radio apparatus (121-124) of said first radiotelephone system (102) in the same cell;assigning for each cell (401-404) at least one access channel and at least one of the plurality of voice channels for the cell to the fixed site radio apparatus (121-124) of said first radiotelephone system (102) located in the cell, and at least one paging channel and at least one of the plurality of voice channels for the cell to the fixed site radio apparatus (411-414) of said second radiotelephone system (102) located in the cell; anddirecting a predetermined percentage of telephone calls originated by radiotelephones from said second radiotelephone system (102) to said first radiotelephone system (101).
- The method according to claim 1, wherein new cells are added for expanding the geographical area, and characterized in that said locating step further includes the step of locating fixed site radio apparatus of said second radiotelephone system (102) in each new cell.
- The method according to claim 1, wherein each originating radiotelephone sends a dialed telephone number and characterized in that said directing step further includes, at said first radiotelephone system (102), the steps of:receiving a request for a voice channel from an originating radiotelephone;assigning a voice channel to said originating radiotelephone; andterminating said originating radiotelephone to an available one of the out trunks (159) of said first radiotelephone system (102) or inter-office trunks (150) of said first radiotelephone system (102).
- The method according to claim 1, characterized in that said directing step further includes the step of sending a directed retry message to said originating radiotelephone.
- The method according to claim 1, further including the steps of:receiving a telephone number of a radiotelephone from one of said in trunks; andpaging the radiotelephone having the received telephone number on the paging channels of each cell.
- The method according to claim 1, wherein said radiotelephones transmit a page response message in response to receiving a paging message, and said paging step includes the step of sending a paging message to the radiotelephone having the received telephone number, said method further including the steps of:receiving a page response message from said paged radiotelephone; andsending a voice channel assignment message to said paged radiotelephone if a page response message is received.
- A communications system coupled to a central office (110) for processing radiotelephone calls, comprising, in combination:first (102) and second (101) radiotelephone systems for providing telephone service to radiotelephones located in geographical area, said geographical area divided into a plurality of cells (411-414), each cell (411-414) assigned a plurality of voice channels, a paging channel and/or an access channel utilizing radio channels which differ from those radio channels assigned to adjoining cells;said first radiotelephone system (102) including:a plurality of inter-office trunks (150); anda plurality of fixed site radio apparatus (121-124) each located in a different cell (411-414) for communicating with said radiotelephones, each fixed site radio apparatus (121-124) of said first radiotelephone system (102) being assigned at least one access channel and at least two of the plurality of voice channels for the cell in which it is located; CHARACTERIZED IN THATsaid second radiotelephone system (101) including;a plurality of in trunks (157) and a plurality of out trunks (155) coupled to the central office (110);a plurality of inter-office trunks (150) coupled to inter-office trunks of said first radiotelephone system (102); anda plurality of fixed site radio apparatus (411-414) each located in a different cell (401-404) for communicating with said radiotelephones, each fixed site radio apparatus (411-414) of said second radio telephone system (101) being assigned at least one paging channel and at least two of the plurality of voice channels for the cell in which it is located, and each fixed site radio apparatus (121-124) of said first radiotelephone system (102) being located with the fixed site radio apparatus (411-414) of said second radiotelephone system (101) in the same cell (401-404).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/075,914 US4799253A (en) | 1987-07-20 | 1987-07-20 | Colocated cellular radiotelephone systems |
US75914 | 1987-07-20 | ||
EP88306565A EP0300721B1 (en) | 1987-07-20 | 1988-07-18 | Colocated cellular radiotelephone systems |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88306565A Division EP0300721B1 (en) | 1987-07-20 | 1988-07-18 | Colocated cellular radiotelephone systems |
EP88306565.8 Division | 1988-07-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0595786A2 EP0595786A2 (en) | 1994-05-04 |
EP0595786A3 EP0595786A3 (en) | 1994-08-10 |
EP0595786B1 true EP0595786B1 (en) | 1998-12-16 |
Family
ID=22128728
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94100417A Expired - Lifetime EP0595786B1 (en) | 1987-07-20 | 1988-07-18 | Colocated cellular radiotelephone systems |
EP88306565A Expired - Lifetime EP0300721B1 (en) | 1987-07-20 | 1988-07-18 | Colocated cellular radiotelephone systems |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88306565A Expired - Lifetime EP0300721B1 (en) | 1987-07-20 | 1988-07-18 | Colocated cellular radiotelephone systems |
Country Status (9)
Country | Link |
---|---|
US (2) | US4799253A (en) |
EP (2) | EP0595786B1 (en) |
JP (1) | JP2623725B2 (en) |
KR (1) | KR960004693B1 (en) |
AT (2) | ATE174745T1 (en) |
CA (1) | CA1282838C (en) |
DE (2) | DE3856283T2 (en) |
IL (1) | IL86345A (en) |
MX (1) | MX165117B (en) |
Families Citing this family (141)
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- 1987-07-20 US US07/075,914 patent/US4799253A/en not_active Expired - Lifetime
-
1988
- 1988-05-11 IL IL86345A patent/IL86345A/en not_active IP Right Cessation
- 1988-05-12 CA CA000566621A patent/CA1282838C/en not_active Expired - Lifetime
- 1988-07-18 EP EP94100417A patent/EP0595786B1/en not_active Expired - Lifetime
- 1988-07-18 DE DE3856283T patent/DE3856283T2/en not_active Expired - Lifetime
- 1988-07-18 EP EP88306565A patent/EP0300721B1/en not_active Expired - Lifetime
- 1988-07-18 DE DE3851805T patent/DE3851805T2/en not_active Expired - Lifetime
- 1988-07-18 AT AT94100417T patent/ATE174745T1/en not_active IP Right Cessation
- 1988-07-18 AT AT88306565T patent/ATE112919T1/en not_active IP Right Cessation
- 1988-07-18 MX MX12311A patent/MX165117B/en unknown
- 1988-07-19 JP JP63181473A patent/JP2623725B2/en not_active Expired - Fee Related
- 1988-07-20 KR KR1019880009045A patent/KR960004693B1/en not_active IP Right Cessation
- 1988-11-25 US US07/276,495 patent/US4893327A/en not_active Expired - Lifetime
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ATE174745T1 (en) | 1999-01-15 |
IL86345A0 (en) | 1988-11-15 |
JP2623725B2 (en) | 1997-06-25 |
CA1282838C (en) | 1991-04-09 |
US4893327A (en) | 1990-01-09 |
US4799253A (en) | 1989-01-17 |
EP0300721B1 (en) | 1994-10-12 |
ATE112919T1 (en) | 1994-10-15 |
JPH01117532A (en) | 1989-05-10 |
EP0595786A3 (en) | 1994-08-10 |
DE3856283T2 (en) | 1999-07-08 |
DE3856283D1 (en) | 1999-01-28 |
KR890003155A (en) | 1989-04-13 |
KR960004693B1 (en) | 1996-04-11 |
EP0595786A2 (en) | 1994-05-04 |
MX165117B (en) | 1992-10-27 |
IL86345A (en) | 1992-08-18 |
DE3851805D1 (en) | 1994-11-17 |
DE3851805T2 (en) | 1995-05-11 |
EP0300721A3 (en) | 1990-05-09 |
EP0300721A2 (en) | 1989-01-25 |
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